diff --git a/configure b/configure
index b59f23ec59..fa785cdd1b 100755
--- a/configure
+++ b/configure
@@ -24423,6 +24423,7 @@ fi
 
 for ac_func in \
 	bcopy			\
+	clock_gettime	\
 	closesocket		\
 	chroot			\
 	endgrent		\
diff --git a/include/portable.hin b/include/portable.hin
index f9486fbfb6..168816b44c 100644
--- a/include/portable.hin
+++ b/include/portable.hin
@@ -105,6 +105,9 @@
 /* Define to 1 if you have the `chroot' function. */
 #undef HAVE_CHROOT
 
+/* Define to 1 if you have the `clock_gettime' function. */
+#undef HAVE_CLOCK_GETTIME
+
 /* Define to 1 if you have the `closesocket' function. */
 #undef HAVE_CLOSESOCKET